Support --dependencies for recursively loading modules.

share/spack/setup-env.sh

@@ -101,7 +101,7 @@ function spack {
             _sp_subcommand_args=""
             _sp_module_args=""
             while [[ "$1" =~ ^- ]]; do
-                if [ "$1" = "-r" ]; then
+                if [ "$1" = "-r" -o "$1" = "--dependencies" ]; then
                     _sp_subcommand_args="$_sp_subcommand_args $1"
                 else
                     _sp_module_args="$_sp_module_args $1"